diff --git a/.openscad_docsgen_rc b/.openscad_docsgen_rc
index e49a310..1e93946 100644
--- a/.openscad_docsgen_rc
+++ b/.openscad_docsgen_rc
@@ -69,7 +69,7 @@ PrioritizeFiles:
   walls.scad
   wiring.scad
 DefineHeader(BulletList): Side Effects
-DefineHeader(Table;Headers=Anchor Name|Position): Extra Anchors
+DefineHeader(Table;Headers=Anchor Name|Position): Named Anchors
 DefineHeader(Table;Headers=Anchor Type|What it is): Anchor Types
 DefineHeader(Table;Headers=Name|Definition): Terminology
 DefineHeader(BulletList): Requirements
diff --git a/bottlecaps.scad b/bottlecaps.scad
index 0a15080..8e398f9 100644
--- a/bottlecaps.scad
+++ b/bottlecaps.scad
@@ -31,7 +31,7 @@ include <rounding.scad>
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "tamper-ring" = Centered at the top of the anti-tamper ring channel.
 //   "support-ring" = Centered at the bottom of the support ring.
 // Example:
@@ -160,7 +160,7 @@ function  pco1810_neck(wall=2, anchor="support-ring", spin=0, orient=UP) =
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "inside-top" = Centered on the inside top of the cap.
 // Examples:
 //   pco1810_cap();
@@ -236,7 +236,7 @@ function pco1810_cap(h, r, d, wall, texture="none", anchor=BOTTOM, spin=0, orien
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "tamper-ring" = Centered at the top of the anti-tamper ring channel.
 //   "support-ring" = Centered at the bottom of the support ring.
 // Example:
@@ -362,7 +362,7 @@ function pco1881_neck(wall=2, anchor="support-ring", spin=0, orient=UP) =
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "inside-top" = Centered on the inside top of the cap.
 // Examples:
 //   pco1881_cap();
@@ -431,7 +431,7 @@ function pco1881_cap(wall=2, texture="none", anchor=BOTTOM, spin=0, orient=UP) =
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "support-ring" = Centered at the bottom of the support ring.
 // Example:
 //   generic_bottle_neck();
@@ -564,7 +564,7 @@ function generic_bottle_neck(
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "inside-top" = Centered on the inside top of the cap.
 // Examples:
 //   generic_bottle_cap(thread_depth=2,neck_od=INCH,height=INCH/2);
diff --git a/gears.scad b/gears.scad
index 658a039..387d8cc 100644
--- a/gears.scad
+++ b/gears.scad
@@ -1643,7 +1643,7 @@ module ring_gear2d(
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "root" = At the base of the teeth, at the center of rack.
 //   "root-left" = At the base of the teeth, at the left end of the rack.
 //   "root-right" = At the base of the teeth, at the right end of the rack.
@@ -1912,7 +1912,7 @@ function rack(
 //   rounding = If true, rack tips and valleys are slightly rounded.  Default: true
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "root" = At the height of the teeth, at the center of rack.
 //   "root-left" = At the height of the teeth, at the left end of the rack.
 //   "root-right" = At the height of the teeth, at the right end of the rack.
@@ -2363,7 +2363,7 @@ module crown_gear(
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: "pitchbase"
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "pitchbase" = With the base of the pitch cone in the XY plane, centered at the origin.  This is the natural height for the gear, and the default anchor.
 //   "apex" = At the pitch cone apex for the bevel gear.
 //   "flattop" = At the top of the flat top of the bevel gear.
diff --git a/math.scad b/math.scad
index d59d159..bb5be7a 100644
--- a/math.scad
+++ b/math.scad
@@ -1374,7 +1374,7 @@ function quadratic_roots(a,b,c,real=false) =
 
 
 // Function: polynomial() 
-// Synopsis: Calculates a polynomial equation at a given value.
+// Synopsis: Evaluate a polynomial at a real or complex value.
 // Topics: Math, Complex Numbers
 // See Also: quadratic_roots(), polynomial(), poly_mult(), poly_div(), poly_add(), poly_roots()
 // Usage:
@@ -1394,7 +1394,7 @@ function polynomial(p,z,k,total) =
 
 
 // Function: poly_mult()
-// Synopsis: Returns the polynomial result of multiplying two polynomial equations.
+// Synopsis: Compute product of two polynomials, returning a polynomial.
 // Topics: Math
 // See Also: quadratic_roots(), polynomial(), poly_mult(), poly_div(), poly_add(), poly_roots()
 // Usage:
@@ -1416,7 +1416,7 @@ function poly_mult(p,q) =
 
     
 // Function: poly_div()
-// Synopsis: Returns the polynomial quotient and remainder results of dividing two polynomial equations.
+// Synopsis: Returns the polynomial quotient and remainder results of dividing two polynomials.
 // Topics: Math
 // See Also: quadratic_roots(), polynomial(), poly_mult(), poly_div(), poly_add(), poly_roots()
 // Usage:
@@ -1457,7 +1457,7 @@ function _poly_trim(p,eps=0) =
 
 
 // Function: poly_add()
-// Synopsis: Returns the polynomial sum of adding two polynomial equations.
+// Synopsis: Returns the polynomial sum of adding two polynomials.
 // Topics: Math
 // See Also: quadratic_roots(), polynomial(), poly_mult(), poly_div(), poly_add(), poly_roots()
 // Usage:
@@ -1475,7 +1475,7 @@ function poly_add(p,q) =
 
 
 // Function: poly_roots()
-// Synopsis: Returns all complex number roots of the given real polynomial.
+// Synopsis: Returns all complex valued roots of the given real polynomial.
 // Topics: Math, Complex Numbers
 // See Also: quadratic_roots(), polynomial(), poly_mult(), poly_div(), poly_add(), poly_roots()
 // Usage:
@@ -1563,7 +1563,8 @@ function _poly_roots(p, pderiv, s, z, tol, i=0) =
 //   parts are zero.  You can specify eps, in which case the test is
 //   z.y/(1+norm(z)) < eps.  Because
 //   of poor convergence and higher error for repeated roots, such roots may
-//   be missed by the algorithm because their imaginary part is large.
+//   be missed by the algorithm because error can make their imaginary parts
+//   large enough to appear non-zero.  
 // Arguments:
 //   p = polynomial to solve as coefficient list, highest power term first
 //   eps = used to determine whether imaginary parts of roots are zero
diff --git a/metric_screws.scad b/metric_screws.scad
index 556e5f0..695ba90 100644
--- a/metric_screws.scad
+++ b/metric_screws.scad
@@ -373,7 +373,7 @@ function get_metric_nut_thickness(size) = lookup(size, [
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "base" = At the base of the head.
 //   "countersunk" = At the head height that would be just barely exposed when countersunk.
 // Examples:
@@ -434,7 +434,7 @@ module generic_screw(
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-// Extra Anchors:
+// Named Anchors:
 //   "base" = At the base of the head.
 //   "countersunk" = At the head height that would be just barely exposed when countersunk.
 //   "shank" = At the bottom start of the unthreaded shank.
diff --git a/regions.scad b/regions.scad
index ba22675..9175da7 100644
--- a/regions.scad
+++ b/regions.scad
@@ -314,7 +314,7 @@ function force_region(poly) = is_path(poly) ? [poly] : poly;
 //   spin = Rotate this many degrees after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   cp = Centerpoint for determining intersection anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 2D point.  Default: "centroid"
 //   atype = Set to "hull" or "intersect" to select anchor type.  Default: "hull"
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the region.
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the region.
diff --git a/rounding.scad b/rounding.scad
index c9dae11..cf8e59a 100644
--- a/rounding.scad
+++ b/rounding.scad
@@ -951,7 +951,7 @@ function _path_join(paths,joint,k=0.5,i=0,result=[],relocate=true,closed=false)
 //   spin = Rotate this many degrees after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   cp = Centerpoint for determining intersection anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 2D point.  Default: "centroid"
 //   atype = Set to "hull" or "intersect" to select anchor type.  Default: "hull"
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the region.
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the region.
@@ -1379,7 +1379,7 @@ module offset_stroke(path, width=1, rounded=true, start, end, check_valid=true,
 //   intersect = Anchors to the surface of the linear sweep of the path, ignoring any end roundings.
 //   surf_hull = Anchors to the convex hull of the offset_sweep shape, including end treatments.
 //   surf_intersect = Anchors to the surface of the offset_sweep shape, including any end treatments.
-// Extra Anchors:
+// Named Anchors:
 //   "base" = Anchor to the base of the shape in its native position, ignoring any "extra"
 //   "top" = Anchor to the top of the shape in its native position, ignoring any "extra"
 //   "zcenter" = Center shape in the Z direction in the native XY position, ignoring any "extra"
@@ -2087,7 +2087,7 @@ function _rp_compute_patches(top, bot, rtop, rsides, ktop, ksides, concave) =
 //   orient = Vector to rotate top towards after spin  (module only)
 //   atype = Select "hull" or "intersect" anchor types.  (module only) Default: "hull"
 //   cp = Centerpoint for determining "intersect" anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 3D point.  (module only) Default: "centroid"
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the prism.
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the prism. 
@@ -2802,7 +2802,7 @@ Access to the derivative smoothing parameter?
 //   orient = Vector to rotate top towards after spin  (module only)
 //   atype = Select "hull" or "intersect" anchor types.  (module only) Default: "hull"
 //   cp = Centerpoint for determining "intersect" anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 3D point.  (module only) Default: "centroid"
-// Extra Anchors:
+// Named Anchors:
 //   "root" = Root point of the joiner prism, pointing out in the direction of the prism axis
 //   "end" = End point of the joiner prism, pointing out in the direction of the prism axis
 // Example(3D,NoScales): Here is the simplest case, a circular prism with a specified length standing vertically on a plane.  
diff --git a/screws.scad b/screws.scad
index 29109c6..632459c 100644
--- a/screws.scad
+++ b/screws.scad
@@ -277,7 +277,7 @@ Torx values:  https://www.stanleyengineeredfastening.com/-/media/web/sef/resourc
 //   shaft = screw shaft
 //   shank = unthreaded section of shaft (invalid if screw is fully threaded)
 //   threads = threaded section of screw     
-// Extra Anchors:
+// Named Anchors:
 //   "top" = top of screw
 //   "bot" = bottom of screw
 //   "center" = center of screw
@@ -803,7 +803,7 @@ module screw(spec, head, drive, thread, drive_size,
 //   shaft = screw shaft
 //   shank = unthreaded section of shaft (invalid if screw is fully threaded)
 //   threads = threaded section of screw     
-// Extra Anchors:
+// Named Anchors:
 //   "top" = top of screw
 //   "bot" = bottom of screw
 //   "center" = center of screw
@@ -1037,7 +1037,7 @@ module screw_hole(spec, head, thread, oversize, hole_oversize, head_oversize,
 //   shoulder = the shoulder
 //   shaft = screw shaft
 //   threads = threaded section of screw     
-// Extra Anchors:
+// Named Anchors:
 //   "top" = top of screw
 //   "bot" = bottom of screw
 //   "center" = center of screw
diff --git a/shapes2d.scad b/shapes2d.scad
index d74aef0..9e2a2ee 100644
--- a/shapes2d.scad
+++ b/shapes2d.scad
@@ -549,7 +549,7 @@ function ellipse(r, d, realign=false, circum=false, uniform=false, anchor=CENTER
 //   align_side = If given as a 2D vector, rotates the whole shape so that the normal of side0 points in that direction.  This occurs before spin.
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "tip0", "tip1", etc. = Each tip has an anchor, pointing outwards.
 //   "side0", "side1", etc. = The center of each side has an anchor, pointing outwards.
 // Example(2D): by Outer Size
@@ -691,7 +691,7 @@ module regular_ngon(n=6, r, d, or, od, ir, id, side, rounding=0, realign=false,
 //   align_side = If given as a 2D vector, rotates the whole shape so that the normal of side0 points in that direction.  This occurs before spin.
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "tip0" ... "tip4" = Each tip has an anchor, pointing outwards.
 //   "side0" ... "side4" = The center of each side has an anchor, pointing outwards.
 // Example(2D): by Outer Size
@@ -752,7 +752,7 @@ module pentagon(r, d, or, od, ir, id, side, rounding=0, realign=false, align_tip
 //   align_side = If given as a 2D vector, rotates the whole shape so that the normal of side0 points in that direction.  This occurs before spin.
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "tip0" ... "tip5" = Each tip has an anchor, pointing outwards.
 //   "side0" ... "side5" = The center of each side has an anchor, pointing outwards.
 // Example(2D): by Outer Size
@@ -812,7 +812,7 @@ module hexagon(r, d, or, od, ir, id, side, rounding=0, realign=false, align_tip,
 //   align_side = If given as a 2D vector, rotates the whole shape so that the normal of side0 points in that direction.  This occurs before spin.
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "tip0" ... "tip7" = Each tip has an anchor, pointing outwards.
 //   "side0" ... "side7" = The center of each side has an anchor, pointing outwards.
 // Example(2D): by Outer Size
@@ -863,7 +863,7 @@ module octagon(r, d, or, od, ir, id, side, rounding=0, realign=false, align_tip,
 //   ---
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "hypot" = Center of angled side, perpendicular to that side.
 // Example(2D):
 //   right_triangle([40,30]);
@@ -1144,7 +1144,7 @@ module trapezoid(h, w1, w2, ang, shift, chamfer=0, rounding=0, flip=false, ancho
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   atype = Choose "hull" or "intersect" anchor methods.  Default: "hull"
-// Extra Anchors:
+// Named Anchors:
 //   "tip0" ... "tip4" = Each tip has an anchor, pointing outwards.
 //   "pit0" ... "pit4" = The inside corner between each tip has an anchor, pointing outwards.
 //   "midpt0" ... "midpt4" = The center-point between each pair of tips has an anchor, pointing outwards.
@@ -1439,7 +1439,7 @@ function teardrop2d(r, ang=45, cap_h, d, circum=false, realign=false, anchor=CEN
 //   d1 = diameter of the left-hand circle
 //   d2 = diameter of the right-hand circle
 //   D = diameter of the joining arcs
-// Extra Anchors:
+// Named Anchors:
 //   "left" = center of the left circle
 //   "right" = center of the right circle
 // Example(2D,NoAxes): This first example shows how the egg is constructed from two circles and two joining arcs.
@@ -1930,7 +1930,7 @@ function _superformula(theta,m1,m2,n1,n2=1,n3=1,a=1,b=1) =
 //   d = Diameter of the shape.  Scale shape to fit in a circle of diameter d.
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "tip0", "tip1", etc. = Each tip has an anchor, pointing outwards.
 // Examples(2D):
 //   reuleaux_polygon(n=3, r=50);
@@ -2025,7 +2025,7 @@ function reuleaux_polygon(n=3, r, d, anchor=CENTER, spin=0) =
 //   script = The script the text is in.  Default: `"latin"`
 //   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `"baseline"`
 //   spin = Rotate this many degrees around the Z axis.  See [spin](attachments.scad#subsection-spin).  Default: `0`
-// Extra Anchors:
+// Named Anchors:
 //   "baseline" = Anchors at the baseline of the text, at the start of the string.
 //   str("baseline",VECTOR) = Anchors at the baseline of the text, modified by the X and Z components of the appended vector.
 // Examples(2D):
diff --git a/shapes3d.scad b/shapes3d.scad
index adae16b..d45589a 100644
--- a/shapes3d.scad
+++ b/shapes3d.scad
@@ -1120,7 +1120,7 @@ function rect_tube(
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
 //
-// Extra Anchors:
+// Named Anchors:
 //   "hypot" = Center of angled wedge face, perpendicular to that face.
 //   "hypot_left" = Left side of angled wedge face, bisecting the angle between the left side and angled faces.
 //   "hypot_right" = Right side of angled wedge face, bisecting the angle between the right side and angled faces.
@@ -2741,7 +2741,7 @@ function torus(
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
 //
-// Extra Anchors:
+// Named Anchors:
 //   "cap" = The center of the top of the cap, oriented with the cap face normal.
 //   "cap_fwd" = The front edge of the cap.
 //   "cap_back" = The back edge of the cap.
@@ -2862,7 +2862,7 @@ function teardrop(h, r, ang=45, cap_h, r1, r2, d, d1, d2, cap_h1, cap_h2,  chamf
 //   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
 //
-// Extra Anchors:
+// Named Anchors:
 //   "cap" = The center of the top of the cap, oriented with the cap face normal.
 //   "tip" = The position where an un-capped onion would come to a point, oriented in the direction the point is from the center.
 //
diff --git a/skin.scad b/skin.scad
index d131dc7..00a151e 100644
--- a/skin.scad
+++ b/skin.scad
@@ -163,7 +163,7 @@
 //   atype = Select "hull" or "intersect" anchor types. Default: "hull"
 //   cp = Centerpoint for determining "intersect" anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 3D point.  Default: "centroid"
 //   style = vnf_vertex_array style.  Default: "min_edge"
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the shape.  
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the shape.
@@ -564,7 +564,7 @@ function skin(profiles, slices, refine=1, method="direct", sampling, caps, close
 //   "hull" = Anchors to the virtual convex hull of the shape.
 //   "intersect" = Anchors to the surface of the shape.
 //   "bbox" = Anchors to the bounding box of the extruded shape.
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = Centers the extruded shape vertically only, but keeps the original path positions in the X and Y.  Oriented UP.
 //   "original_base" = Keeps the original path positions in the X and Y, but at the bottom of the extrusion.  Oriented UP.
 // Example: Extruding a Compound Region.
@@ -886,7 +886,7 @@ function linear_sweep(
 //   anchor = Translate so anchor point is at the origin. Default: "origin"
 //   spin = Rotate this many degrees around Z axis after anchor. Default: 0
 //   orient = Vector to rotate top towards after spin  (module only)
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the shape.  
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the shape.
@@ -1496,7 +1496,7 @@ module spiral_sweep(poly, h, r, turns=1, taper, r1, r2, d, d1, d2, internal=fals
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the shape.
 //   "intersect" = Anchors to the surface of the shape.
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the shape
 //   "start" = When `closed==false`, the origin point of the shape, on the starting face of the object
 //   "end" = When `closed==false`, the origin point of the shape, on the ending face of the object
@@ -2045,7 +2045,7 @@ function path_sweep(shape, path, method="incremental", normal, closed, twist=0,
 //   orient = Vector to rotate top towards after spin
 //   atype = Select "hull" or "intersect" anchor types.  Default: "hull"
 //   cp = Centerpoint for determining "intersect" anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 3D point.  Default: "centroid"
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the shape.  
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the shape.
@@ -2178,7 +2178,7 @@ function _ofs_face_edge(face,firstlen,second=false) =
 //   anchor = Translate so anchor point is at the origin. Default: "origin"
 //   spin = Rotate this many degrees around Z axis after anchor. Default: 0
 //   orient = Vector to rotate top towards after spin  (module only)
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = The native position of the shape.  
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the shape.
@@ -3877,7 +3877,7 @@ function texture(tex, n, border, gap, roughness, inset) =
 ///   anchor = Translate so anchor point is at origin (0,0,0).  See [anchor](attachments.scad#subsection-anchor).  Default: `CENTER`
 ///   spin = Rotate this many degrees around the Z axis after anchor.  See [spin](attachments.scad#subsection-spin).  Default: `0`
 ///   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
-/// Extra Anchors:
+/// Named Anchors:
 ///   "centroid_top" = The centroid of the top of the shape, oriented UP.
 ///   "centroid" = The centroid of the center of the shape, oriented UP.
 ///   "centroid_bot" = The centroid of the bottom of the shape, oriented DOWN.
diff --git a/vnf.scad b/vnf.scad
index a2f7ab9..3ef2290 100644
--- a/vnf.scad
+++ b/vnf.scad
@@ -1063,7 +1063,7 @@ function _slice_3dpolygons(polys, dir, cuts) =
 // Anchor Types:
 //   "hull" = Anchors to the virtual convex hull of the shape.
 //   "intersect" = Anchors to the surface of the shape.
-// Extra Anchors:
+// Named Anchors:
 //   "origin" = Anchor at the origin, oriented UP.
 module vnf_polyhedron(vnf, convexity=2, cp="centroid", anchor="origin", spin=0, orient=UP, atype="hull") {
     vnf = is_vnf_list(vnf)? vnf_join(vnf) : vnf;
diff --git a/walls.scad b/walls.scad
index d14d72e..c1748fe 100644
--- a/walls.scad
+++ b/walls.scad
@@ -256,7 +256,7 @@ module sparse_cuboid(size, dir=RIGHT, strut=5, maxang=30, max_bridge=20,
 //   orient = Vector to rotate top towards, after spin.  See [orient](attachments.scad#subsection-orient).  Default: `UP`
 //   atype = Select "hull", "intersect" anchor types.  Default: "hull"
 //   cp = Centerpoint for determining "intersect" anchors or centering the shape.  Determintes the base of the anchor vector.  Can be "centroid", "mean", "box" or a 3D point.  Default: "centroid"
-// Extra Anchors:
+// Named Anchors:
 //   "base" = Anchor to the base of the shape in its native position
 //   "top" = Anchor to the top of the shape in its native position
 //   "zcenter" = Center shape in the Z direction in the native XY position (default)